how to bind and display ajax chart?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

public partial class demo2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            DataTable dt = new DataTable();
            SqlConnection con = new SqlConnection(@"connectionString);
            SqlCommand cmd=new SqlCommand("select Name, Debit, Credit From aTable",con);
            SqlDataAdapter da=new SqlDataAdapter (cmd);
            da.Fill(dt);
        string[] x = new string[dt.Rows.Count];
        decimal[] z = new decimal[dt.Rows.Count];
        decimal[] y = new decimal[dt.Rows.Count];
        for (int i = 0; i < dt.Rows.Count; i++)
        {
                x[i] = dt.Rows[i][0].ToString();
                y[i] = Convert.ToInt32(dt.Rows[i][1]);
                z[i] = Convert.ToInt32(dt.Rows[i][2]);
        }
            BarChart1.Series.Add(new AjaxControlToolkit.BarChartSeries { Data = y });
            BarChart1.Series.Add(new AjaxControlToolkit.BarChartSeries { Data = z });
            BarChart1.CategoriesAxis = string.Join(",", x);
       }
    }
}